JP2009066190A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing machine preventing the incorrect connection of a hot water supply hose to an end connection. <P>SOLUTION: This washing machine is provided with a hot water supply side end connection 20 for connecting to the hot water supply hose, a water line side end connection 21 for connecting to a water supply hose, a hot water supply side feed valve 22 communicated with the hot water side end connection 20 and controlling to feed hot water into a water tank 4, a water line side feed water valve 25 communicated with the water line side end connection 21 and controlling to feed tap water into the water tank 4, a detergent case 24 communicated with the hot water supply side feed valve 22 and the water line side feed valve 25 and served as a common channel for feeding hot water, tap water and their mixed water inside the water tank 4, and a thermistor 27 for detecting the water temperature. This washing machine determines at least the incorrect connection state of the water supply hose to the hot water side end connection 20 or the incorrect connection state of the hot water supply hose to the water line side end connection 21 based on the detection temperature and notifies either of the incorrect connection states to the user. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a washing machine that performs washing by supplying warm water from a water heater or the like.

Conventionally, washing with warm water has been performed in order to improve the cleaning effect, but as a configuration for washing with warm water, a method of supplying warm water generated by a water heater or the like to a washing machine is generally performed. Yes. In such a washing machine, the hot water supply side connection port and the hot water supply side water supply valve are a water heater and the like,
The water supply side connection port and the water supply side water supply valve are connected to the water supply, and by controlling these water supply valves, the washing operation with hot water of any temperature can be executed. However, in general, the shape of these connection ports is often the same, and the hot water supply hose from the water heater is mistakenly connected to the water supply side connection port, or the water supply hose from the water supply is mistakenly connected to the hot water supply side connection port. There was also. As a result of the connection error, washing may be performed with warm water higher than the desired water temperature, and clothing may be damaged, and the water-side connection port and the water-side water supply valve are not heat-treated, so the water heater There was a possibility that the life of these parts could be reduced by supplying hot water from the factory.

On the other hand, if each of the hot water supply valve and the water supply valve is provided with temperature detection means, and the water temperature supplied from the hot water supply valve is lower than the water temperature supplied from the water supply valve, it is determined that the connection is incorrect. And the washing machine which alert | reports a connection mistake to a user by pausing a warm water process and displaying abnormally is proposed (for example, refer patent document 1).

On the other hand, when connection of the connection hose to both the first and second water supply valves is wrong, the opening selection to both the water supply valves is reversed, and as a result, water and hot water are supplied correctly. Therefore, a washing machine that can prevent the clothing from being damaged has been proposed (see, for example, Patent Document 2).
JP-A-6-126083 (FIG. 5) JP-A-6-335593 (FIG. 1)

However, in the washing machines described in Patent Documents 1 and 2, it is necessary to provide a thermistor that is a temperature detecting means on both the hot water supply side and the water supply side, so that the cost of parts is increased.

Further, in the washing machine described in Patent Document 2, since the user tries to perform the washing operation even in the erroneous connection state, the user cannot recognize the erroneous connection state, and the next time the laundry operation is performed in the erroneous connection state. Therefore, in order to prevent problems caused by thermal deterioration of the water supply side connection port and the water supply side water supply valve, it was necessary to use an expensive material excellent in heat resistance.

The present invention has been made in view of the above circumstances, and therefore the object is to notify the user of an erroneous connection of the hot water supply hose to the hot water supply side connection port or an erroneous connection of the hot water supply hose to the water supply side connection port. Another object of the present invention is to provide a washing machine that prevents an erroneous connection state from being left unattended.

In order to achieve the above object, a washing machine according to claim 1 of the present invention contains an outer box, a water tank provided in the outer box, and a water tank provided rotatably in the water tank. A rotating tank, a hot water supply side connection port for connection with a hot water supply hose, a water supply side connection port for connection with a water supply hose,
A hot water supply side water supply valve that communicates with the hot water supply side connection port and controls supply of hot water into the water tank, and a water supply side water supply that communicates with the water supply side connection port and controls supply of tap water into the water tank. A water supply path that communicates with a valve, the hot water supply water supply valve, and the water supply water supply valve, and serves as a common flow path for supplying hot water, tap water, and a mixed water thereof into the water tank, and the water supply path Based on the temperature detection means for detecting the water temperature of the water, and the temperature detected by the temperature detection means, at least an erroneous connection state of the water supply hose to the hot water supply side connection port, or an erroneous connection state of the hot water supply hose to the water supply side connection port And a misconnection state notifying unit for notifying a user of any of the above described misconnection states.

According to the present invention, it is possible to prompt the user to correct the erroneous connection state, and it is possible to prevent the erroneous connection state from continuing.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a vertical side view of a vertical washing and drying machine. In FIG. 1, an outer box 1 has a rectangular cylindrical shape, and an outer shell of a washing machine is formed by the outer box 1 and a top cover 2 mounted on an upper portion of the outer box 1. Legs 3 are provided on the lower surface of the outer box 1.

In the outer box 1, a water tank 4 capable of storing water is elastically supported by the outer box 1 via an elastic suspension mechanism 5 mainly having a suspension bar 5 a. And in this water tank 4, in the surrounding wall part, many through-holes 6 are provided.
A rotating tub 7 having a rotator is rotatably arranged. Both the water tank 4 and the rotating tank 7 have a bottomed cylindrical shape, and are arranged in a vertical axis shape in which the respective axis center lines are directed in the vertical direction. A rotation balancer 8 is provided at the peripheral edge of the upper end opening of the rotating tub 7.

A pulsator 9 is rotatably disposed at the bottom of the rotating tank 7, and a driving device 10 is disposed at the outer bottom of the water tank 4. The driving device 10 includes a DC brushless type motor 11 that can rotate forward and reverse, a clutch mechanism (not shown), and the like, and is configured to selectively rotate the pulsator 9 and the rotating tub 7. On the upper surface of the water tank 4, an annular water tank cover 12 is provided.
Is provided.

The top cover 2 is provided with a laundry entrance / exit 13, and a lid 14 for opening and closing the laundry entrance / exit 13 is rotatably provided via a rear hinge 14a. In this case, the lid 14 is folded in two.

A drain port 15 is formed at the bottom of the water tank 5, a drain valve 17 is disposed in a drain path 16 extending from the drain port 15, and a drain hose downstream of the drain valve 17. Can be connected. Then, by opening and closing the drain valve 17 composed of an electromagnetic valve, the washing water stored in the water tank 4 is discharged through the drain path 16 and the drain hose.

As shown in FIG. 2, an operation panel 18 for operating the washing machine is provided on the upper surface of the front portion of the top cover 2.

The operation panel 18 includes operation keys 18a for setting various selected courses and a display unit 18b for displaying a washing time and the like. An electronic unit including a control circuit 19 (see FIG. 3) serving as control means is disposed inside the top cover 2 forming the operation panel 18.

In addition, a hot water supply side connection port 20 to which a hot water supply hose for connection to a hot water heater or the like can be attached and a water supply side connection port 21 to which a water supply hose for connection to water supply can be attached are formed behind the top cover 2. ing. A hot water supply side water supply valve 22 is disposed on the downstream side of the hot water supply side connection port 20, and hot water supplied from a water heater or the like passes through the hot water supply path 23 to form a substantially rectangular detergent case 2.
4 is configured. On the other hand, on the downstream side of the water supply side connection port 21, there is a water supply side water supply valve 2.
5 is arranged so that water supplied from the water supply reaches the detergent case 24 via the water supply path 26. Therefore, the detergent case 24 is a water supply path serving as a common flow path for hot water, tap water, and mixed water thereof. When the hot water supply side connection port 20 and the water supply side connection port 21 are opened, the water supply detergent case Warm water and tap water are mixed in 24, and the water tank 4 from the detergent case 24 is mixed.
Mixed water is supplied inside.

A thermistor 27 serving as temperature detecting means is provided at the bottom of the detergent case 24.
The thermistor 27 can detect the temperature of water in the detergent case 24.

The hot water supply side connection port 20 can supply hot water of about 45 to 55 ° C. into the water tank 4 from an externally connected water heater.

FIG. 3 shows an electrical block diagram of the washing machine. Input information related to the washing operation input to the operation key 18 a is sent to the control circuit 19. Although not shown in detail, the water tank 4 is provided with a water level sensor 29 that communicates with the water tank 4 itself and detects the water level in the water tank 4.
The water level information is always sent to the control circuit. Further, temperature information from the thermistor 27 described above is also sent to the control circuit. The control circuit 19 and the thermistor 27 together constitute an erroneous connection state determination means. Further, the motor 11 is provided with a rotation sensor 30 composed of a Hall IC or the like for detecting the rotation speed or position of the motor, and the rotation speed and position information of the motor 11 detected by the rotation sensor 30 is sent to the control circuit 19. It has been sent.

On the other hand, the control circuit 19 is electrically connected to the display unit 18 b, the buzzer 31, the hot water supply side water supply valve 22, the water supply side water supply valve 25, the motor 11, and the drain valve 17 via the drive circuit 28. The control circuit 19 is configured to display the washing operation information on the display unit 18b. Further, a buzzer 31 is connected to the control circuit 19. Both the display unit 18b and the buzzer 31 function as erroneous connection state notification means. The control circuit 19 has an EEPROM 32 as nonvolatile storage means.

Next, the control content of the washing machine will be described. The washing operation of the washing machine includes at least a washing process, a draining process, a dehydrating process, a rinsing process, a draining process, and a dehydrating process, and is executed in this order.

When the power is turned on, by operating the operation key 18a, a plurality of washing courses having different washing conditions such as water level, washing time, rinsing time, dewatering time and the like can be selected, and the washing conditions are set for each course. Is possible. As one of the washing conditions, this washing machine has a “HOT course” in which only hot water from a water heater is used for washing, and a “COO” in which only water is used for washing.
Three types of courses having different cleaning water temperatures can be selected, such as “L course” and “WARM course” in which washing is performed using a mixed water of hot water and tap water from a water heater.
Hereinafter, it explains for every course.

As shown in FIG. 4, when the “HOT course” is selected and the washing operation is started, the control circuit 19 confirms the erroneous connection state flag of the EEPROM 32 (step S1), and the flag = “1”.
If it is (step S1: YES), the display unit 18b displays that it is in an erroneous connection state, and the buzzer 31 is sounded to notify the user of an abnormal connection state (step S2). ). Then, the erroneous connection flag is set to “0” (step S3), and the process proceeds to cloth amount detection (step 4). The cloth amount detection here is, for example, the rotational speed of the motor 11 when the motor 11 is energized for a predetermined time to rotate the pulsator 9 in one direction.
As the amount of cloth in the rotary tub 7 increases, the load amount of the motor 11 increases and the number of rotations decreases. Therefore, the amount of cloth can be detected by detecting the number of rotations. .

On the other hand, when the flag = “0” (step S1: NO), the erroneous connection flag is set to “0”.
(Step S3), and the process proceeds to the next step, cloth amount detection, without notifying the abnormality (step S4).

Next, only the hot water supply side water supply valve 22 is opened (step S5), hot water is supplied into the water tank 4, and the water temperature Th is detected by the thermistor 27 (step S6). Step S6: YES), it is determined whether or not the water level in the water tank 4 has reached the set water level based on the detection signal from the water level sensor 29 (Step S8), and if it has reached the set water level (Step S8: YES), the hot water supply side The water supply valve 22 is closed to finish water supply (step S9).
). And it transfers to the washing operation of the laundry by the forward / reverse rotation of the pulsator 9 (step S1).
0), a draining operation by sequentially opening the drain valve 17 (step S11), and a dehydrating operation (step S12) for rotating the rotating tub 7 with the drain valve 17 being opened are executed, and thereafter A and below in FIG. Proceed to the rinsing process.

On the other hand, when the water temperature Th is less than 43 degrees in step S6 (step S6: NO)
), It is determined that the water supply hose is erroneously connected to the hot water supply side connection port 20, and an abnormality is notified (step S13). Specifically, the display unit 18b displays that the connection is incorrect, and the buzzer 31 is sounded to notify the user that the connection is incorrect. Further, the erroneous connection flag is changed from “0” to “1” and stored in the EEPROM 32 (step S14). As a result, even when the power is turned off,
In step S1, it is confirmed whether the erroneous connection flag is “1”, and if it is “1”, an abnormality is notified (step S2).

It should be noted that the thermistor 27 always detects whether the water temperature Th is 60 degrees or higher from the start of the hot water supply in step 5 until the water supply to the set water level is completed in step S8 (
Step S7) When it is detected that the water temperature is 60 degrees or higher (Step S7: YES)
In the same manner as in step S2, an abnormality is notified (step S15), and the operation is stopped during the washing operation (step S16).

FIG. 5 shows a rinsing process and a dehydrating process following the washing process shown in FIG. In this rinsing step, the hot water supply side water supply valve 22 remains closed and the water supply side water supply valve 25 is opened (step S).
21) In order to perform the rinsing process with tap water, only tap water is supplied into the water tank 4. Here, as a result of detecting the water temperature Th by the thermistor 27 (step S22), the water temperature Th is 43.
If it is less than the degree (step S22: NO), the water tank 4 is detected by the detection signal from the water level sensor 29.
It is determined whether the water level in the tank has reached the set water level (step S23). If the water level has reached the set water level (step 23: YES), the water supply side water supply valve 25 is closed and the water supply into the water tank 4 is terminated. (Step S24). Then, the process shifts to the laundry rinsing operation by forward / reverse rotation of the pulsator 9 (step S25). The drainage operation by sequentially opening the drain valve 17 (step S26) and the rotation with the drain valve 17 opened. After performing the spin-drying | dehydration operation (step S27) which rotates the tank 7, a washing operation is complete | finished.

On the other hand, when the water temperature Th is 43 degrees or higher in step S22 (step S22:
YES), it is determined that the hot water supply hose is erroneously connected to the water supply side connection port 21, and abnormality notification is first performed (step S28). Specifically, the display unit 18b displays that the connection is incorrect, and the buzzer 31 is sounded to notify the user that the connection is incorrect. Further, the erroneous connection flag is changed from “0” to “1” and stored in the EEPROM 32 (step S29), and the washing operation is stopped (step S30). Thereby, even when the power is turned off, the erroneous connection flag is set to “1” in step S1 during the washing operation after the power is turned on again.
"Is confirmed, and if it is" 1 ", an abnormality is notified (step S2).

Next, the “WARM course” will be described with reference to FIG. When the “WARM course” is selected and the washing operation is started, the control circuit 19 checks the erroneous connection state flag of the EEPROM 32 (step S41), and if the flag = “1” (step S41: YE).
S) The display unit 18b displays that the connection is incorrect, and the buzzer 31 is sounded to notify the user that the connection is incorrect (step S42). And
The erroneous connection flag is set to “0” (step S43), and the process proceeds to cloth amount detection (step 44).

On the other hand, when the flag = “0” (step S41: NO), the erroneous connection flag is set to “0”.
(Step S43), and the process proceeds to the next step, cloth amount detection, without notifying the abnormality (
Step S44).

Subsequently, the hot water supply side water supply valve 22 and the water supply side water supply valve 25 are simultaneously opened (step S45).
Then, a mixture of hot water and tap water from a water heater or the like is supplied into the aquarium 4, and it is determined whether or not the water level in the aquarium 4 has reached the set water level by a detection signal from the water level sensor 29 (step S47). If the water level has been reached (step S47: YES), the hot water supply side water supply valve 22 and the water supply side water supply valve 25 are closed to end the water supply (step S48). Then, similarly to the “HOT course”, the process shifts to the washing operation of the laundry by forward / reverse rotation of the pulsator 9 (step S4).
9) Sequentially, the drainage operation by opening the drain valve 17 (step S50), and the dewatering operation (step S51) by rotating the rotating tub 7 with the drain valve 17 open, execute FIG.
The process proceeds to a rinsing process after A, and the rinsing process and the dehydrating process are sequentially performed as described above to complete the washing operation.

On the other hand, the water temperature Th is always detected by the thermistor 27 until the water supply to the set water level is completed in step S47 after the water supply in step 45 is started (step S46). When it is detected that the angle is 60 degrees or more (step S46).
: YES), an abnormality is notified in the same manner as in step S2 (step S52), and the operation is stopped during the washing operation (step S53).

Next, the “COOL course” will be described with reference to FIG. When the “COOL course” is selected and the washing operation is started, the control circuit 19 confirms the erroneous connection state flag of the EEPROM 32 (step S61). If the flag = “1” (step S61: YE)
S) The display unit 18b displays that the connection is incorrect, and the buzzer 31 is sounded to notify the user that the connection is incorrect (step S62). And
The erroneous connection flag is maintained at “0” (step S63), and the process proceeds to cloth amount detection (step 64).
).

On the other hand, when the flag = “0” (step S61: NO), the erroneous connection flag is set to “0”.
(Step S63), without notifying the abnormality, the process proceeds to the next step, cloth amount detection (step S64).

Next, only the water supply side water supply valve 25 is opened (step S65), tap water is supplied into the water tank 4, and the water temperature Th is detected by the thermistor 27 (step S66).
If it is less than 3 degrees (step S66: YES), it is determined whether or not the water level in the water tank 4 has reached the set water level based on the detection signal from the water level sensor 29 (step S67), and if it has reached the set water level (step S67). (S67: YES), the water supply side water supply valve 25 is closed and water supply is terminated (
Step S68). Then, similarly to the “HOT course”, the operation shifts to the washing operation of the laundry by forward / reverse rotation of the pulsator 9 (step S69), and sequentially the draining operation by opening the drain valve 17 (step S70), Then, with the drain valve 17 open, the rotating tub 7 is rotated to execute the dehydrating operation (step S71), and the process proceeds to the rinsing process after A in FIG. 5, and the rinsing process and the dehydrating process are sequentially performed as described above. End washing operation.

On the other hand, when the water temperature Th is 43 degrees or higher in step S66 (step S66:
NO), it is determined that the hot water supply hose is erroneously connected to the water supply side connection port 20, and an abnormality is notified (step S72). Specifically, the display unit 18b displays that the connection is incorrect, and the buzzer 31 is sounded to notify the user that the connection is incorrect.
Further, the erroneous connection flag is changed from “0” to “1” and stored in the EEPROM 32 (
Step S73), and the operation is stopped during the washing operation (Step S74).

According to the configuration of the above-described embodiment, the following operations and effects can be achieved.

The erroneous connection state of the water supply hose to the hot water supply side connection port 20 or the erroneous connection state of the hot water supply hose to the water supply side connection port 21 is determined from the selection information of the washing course and the detected temperature Th by the thermistor 27, and the display unit 18 b and the buzzer 31. Since it is configured to notify the user, it is possible to prompt the user to correct the erroneous connection state and prevent the erroneous connection state from continuing. In addition, since the thermistor 27 is provided in the water supply path which is a common flow path of hot water, tap water, and mixed water thereof,
An inexpensive configuration in which one thermistor 27 is provided in the water supply path to reliably detect both the erroneous connection state of the hot water supply hose to the hot water supply side connection port 20 and the erroneous connection state of the hot water supply hose to the water supply side connection port 21. Can do. Moreover, since an erroneous connection state can be detected immediately before hot water is supplied into the water tank 4 or shortly after the hot water supply, even when the hot water supply hose is erroneously connected to the water supply side connection port, cloth pain due to hot water can be reduced. Furthermore, since the misconnection state of the hot water supply hose with respect to the water supply side connection port 21 can be reliably determined and notified to the user, the deterioration of the components of the water supply path due to the hot water supply can be prevented. Since the washing operation is stopped when it is determined that any of the above-described erroneous connection states, it is possible to prevent deterioration of parts of the water supply path 26 due to hot water supply in the erroneous connection state.

Each is equipped with a washing course that is run by supplying hot water, tap water, or a mixture of these from a water heater into the aquarium 4, and in the washing course with hot water and tap water, the connection is incorrect when water is supplied during the washing process. In the washing course with mixed water, it is configured to determine whether there is an erroneous connection state when water is supplied in the rinsing process, so it is not possible to determine an erroneous connection state with mixed water supply in the washing process during mixing. Even in this case, an erroneous connection state can be determined even in the rinsing process in which only the water supply side water supply valve 25 is opened.

When the erroneous connection state is determined, the erroneous connection state is stored in the EEPROM 32 as the storage means, and the display unit 18b and the buzzer 31 notify the erroneous connection state when the power is turned on next time. When the operation is continued, the incorrect connection status can be informed at the next operation and the user can be urged to correct it, thereby preventing the fabric pain and deterioration of water supply parts due to the continued incorrect connection status. it can.

The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the spirit of the present invention.

For example, without providing the detergent case 24, hot water from a hot water supply hose is supplied directly into the water tank 4 through a hot water supply path 23 connected to the hot water supply side water supply valve 22, and tap water is supplied to the water supply side water supply valve 25. It is good also as a structure supplied directly in the water tank 4 via the path | route 26. FIG. In this case, the thermistor 27 is disposed adjacent to the hot water supply path 23 and the tap water supply path 26 as long as the temperature of the mixed water after the joining of the hot water from the hot water heater and the tap water can be detected. Alternatively, it may be arranged at the bottom of the water tank 4. In the former case, in addition to the above-described effects, even if there is a configuration in which there is no common water supply path for hot water and tap water, an erroneous connection state can be detected by one thermistor 27 and the user can be surely notified. Furthermore, in the latter case, since the thermistor 27 detects the temperature of the mixed water after being mixed in the water tank 4 and supplying water, the erroneous connection state can be detected more accurately.

Furthermore, as a washing operation, it is good also as a structure which performs a rinse process twice, and it is good also as a structure which detects a misconnection in the 2nd rinse process.

The side view which fractures | ruptures and shows a part of washing machine which shows 1st Example of this invention The figure which cuts and shows the upper surface of a washing machine partially Electrical block diagram The flowchart which shows the washing process of the HOT course which is one Example of this invention The flowchart which shows the rinsing process among one Example of this invention. The flowchart which shows the washing process of the WARM course which is one Example of this invention The flowchart which shows the washing process of the COOL course which is one Example of this invention

Explanation of symbols

4 Water tank 7 Rotating tank 19 Control circuit 20 Hot water supply side connection port 21 Water supply side connection port 22 Hot water supply side water supply valve 23 Hot water supply route 24 Detergent case 25 Water supply side water supply valve 26 Water supply route 27 Thermistor 31 Buzzer 32 EEPROM (memory means)

Claims (6)

An outer box,
A water tank provided in the outer box;
A rotating tank that is rotatably provided in the water tank and accommodates an object to be cleaned;
A hot water supply side connection port for connection with a hot water supply hose;
A water supply side connection port for connection with a water supply hose;
A hot water supply side water supply valve for communicating with the hot water supply side connection port and controlling supply of hot water into the water tank;
A water supply valve that communicates with the water supply side connection port and controls supply of tap water into the water tank;
A water supply path that communicates with the hot water supply side water supply valve and the water supply side water supply valve and serves as a common flow path for supplying hot water, tap water, and mixed water thereof into the water tank,
Temperature detecting means for detecting the water temperature of the water supply path;
Based on the temperature detected by the temperature detection means, at least an erroneous connection state of the water supply hose to the hot water supply side connection port, or an erroneous connection state determination means to determine an incorrect connection state of the hot water supply hose to the water supply side connection port;
A washing machine comprising: an erroneous connection state notifying unit that notifies a user of any of the erroneous connection states described above. An outer box,
A water tank provided in the outer box;
A rotating tank that is rotatably provided in the water tank and accommodates an object to be cleaned;
A hot water supply side connection port for connection with a hot water supply hose;
A water supply side connection port for connection with a water supply hose;
A hot water supply side water supply valve for communicating with the hot water supply side connection port and controlling supply of hot water into the water tank;
A water supply valve that communicates with the water supply side connection port and controls supply of tap water into the water tank;
A hot water supply path communicating with the hot water supply side water supply valve and supplying hot water into the water tank;
A water supply path that communicates with the water supply side water supply valve and supplies tap water into the water tank;
Temperature detecting means for detecting the water temperature of the hot water supply path and the water supply path;
Based on the temperature detected by the temperature detection means, at least an erroneous connection state of the water supply hose to the hot water supply side connection port, or an erroneous connection state determination means to determine an incorrect connection state of the hot water supply hose to the water supply side connection port;
A washing machine comprising: an erroneous connection state notifying unit that notifies a user of any of the erroneous connection states described above. An outer box,
A water tank provided in the outer box;
A rotating tank that is rotatably provided in the water tank and accommodates an object to be cleaned;
A hot water supply side connection port for connection with a hot water supply hose;
A water supply side connection port for connection with a water supply hose;
A hot water supply side water supply valve for communicating with the hot water supply side connection port and controlling supply of hot water into the water tank;
A water supply valve that communicates with the water supply side connection port and controls supply of tap water into the water tank;
A hot water supply path communicating with the hot water supply side water supply valve and supplying hot water into the water tank;
A water supply path communicating with the water supply side water supply valve and supplying water into the water tank;
Provided in the water tank, with temperature detection means for detecting the water temperature,
Based on the temperature detected by the temperature detection means, at least an erroneous connection state determination means for determining an erroneous connection state of the hot water supply hose to the hot water supply side connection port, or an erroneous connection state of the hot water supply hose to the water supply side connection port, A washing machine comprising: an erroneous connection state notifying means for notifying a user of such an erroneous connection state. The washing machine according to any one of claims 1 to 3, wherein the washing operation is stopped when the erroneous connection state determination means determines any of the erroneous connection states described above. Each has a washing course that is run by supplying hot water from a water heater, tap water, or a mixture of these water into the tank, and in the washing course with hot water and tap water, the connection is incorrect when water is supplied during the washing process. The washing machine according to any one of claims 1 to 3, wherein in a washing course with mixed water, it is determined whether or not an erroneous connection state occurs when water is supplied in a rinsing process. 2. An erroneous connection state is stored in a storage means when an erroneous connection state is determined by an erroneous connection state determination means, and an erroneous connection state is notified by an erroneous connection state notification means at the next power-on. 4. The washing machine according to any one of 3.

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